The Guardian has reported today that an updated biography of the prime minister claims David Cameron texted Rebekah Brooks before she quit as News International’s chief executive.

An article on the Guardian‘s website reports that Cameron allegedly texted Brooks “to tell her to keep her head up” days before she resigned from News International.

It has also emerged that he agreed to meet her at a point-to-point horse race so long as they were not seen together, and that he also pressed the Metropolitan police to review the Madeleine McCann case in May last year following pressure from Brooks.

The prime minister then sent an intermediary to Brooks to explain why contacts had to be brought to an abrupt halt after she resigned. The authors say the gist of that message was: “Sorry I couldn’t have been as loyal to you as you have been to me, but Ed Miliband had me on the run.”

The revelations were made in the updated version of Cameron: Practically a Conservative by Francis Elliot and James Hanning. Brooks is due to appear before the Leveson inquiry on Friday.